Abstract: In order to comprehensively evaluate the risk of mine fire, a comprehensive evaluation method of mine fire risk is proposed by combining AHP method, entropy weight method, variable weight theory and catastrophe progression method. The main idea of this evaluation method is to couple the subjective and objective factors of the AHP method and the entropy weighting method to obtain the constant weight value of the index, select the penalty-incentive variable weight function to solve the variable weight value, and then combine the Pearson correlation coefficient to improve the subsequent mutation series method to determine the mine fire risk level. On the basis of the existing evaluation examples of mine fire risk, the mine fire risk assessment system is established from four aspects of human, machine, management and environment. Taking the goaf of 11613 working face in Qinglong Coal Mine of Guizhou province as an example, 16 main influencing factors were selected for fire risk assessment. The assessment results were as follows: the total catastrophe level value was 0.704 8, and the fire risk was general risk. A series of measures were proposed from the four factors of human, machine, environment and management to reduce the risk of mine fire.

Key words: mine fire, penalty-incentive variable weight method;mutation theory, safety evaluation